warning AUDI A3 2015 Repair Manual

86 Audi adaptive cruise control
• To increase or reduce the speed in incre­
ments,
tap the lever up or down .
• To increase or decrease the speed quickly,
hold the lever up or down until the red LED
@ reaches the desired speed c:> page 84,
fig. 75.
After each change, the new stored speed ap­
pears briefly in the information line
c:;, page 84 , fig. 75 @.
Driving in stop-and-go traffic
App lies to vehicles: with Audi adaptive cruise control
The adaptive cruise control system assists you
in stop-and-go traffic.
If an object that is de­
tected ahead stops, you r vehicle will brake
and stay at a stop , wi th in the limits of the sys­
tem .
Starting with adaptive cruise control 1l
If you veh icle brakes to a stop because an ob­
ject is detected ahead,
ACC autom. go ap­
pears briefly in the instrument clus ter display
Your veh icle is in automatic start mode.
As long as the dr iver message
ACC autom. go
is displayed and the object detected ahead
starts to move, your vehicle will continue driv­
ing
c:> .&, .
You can activate ACC autom . go again by pull­
ing the lever to the position @
c:> page 86,
fig. 77
The start mode ACC autom. go ends when the
brake pedal is pressed .
Criteria for switching off
The adaptive cruise control sw itches off for
safety reasons when stationary :
- when the dr iver's door is open,
- when the vehicle is stationary for more than
3 m inutes,
- when the dr iver's safety be lt is not fastened .
ll This is not available in some countries .
A WARNING
-~
When the message ACC autom. go1l ap-
pears, the veh icle continues driving, even
i f there is an obstacle between your vehicle
and the object ahead . This increases the
risk of an accident .
(@ Tips
If adaptive cru ise control is active and your
vehicle does not start driving even though
the message
ACC autom . go1
) appears,
you can start by tapping the accelerator
pedal.
- If an obstacle is detected when your ve­
hicle starts driving, the system will
prompt you to take over
c:> page 88.
Your vehicle will drive more slowly when
starting. This may also happen in some
sit uations when no obstacle is apparent.
Interrupting cruise control
Applies to vehicles: wit h Audi adapt ive cruise control
Fig. 77 Op erat ing leve r
Requirement: The adaptive cruise control is
switched on.
Overriding cruise control
Overriding means exceeding the selected
speed when adaptive cruise control is active ,
for example whe n press ing the accelerator
pedal when passing.
• To accele rate manually, pull the lever to­
ward you into position @and hold it there .
The message
ACC: override appears. Or
• press the acce lerator pedal. ...

.. To resume cruise control, release the lever
or take your foot off the acce lerator pedal.
Interrupting cruise control while driving
.. Move the lever into position @. The mes­
sage
ACC: standby appears . Or
.. press the brake pedal.
.. To resume the stored speed, move the lever
into position @.
Interrupting cruise control when stopped
Applies to vehicles w ith an automatic trans­
mission:
.,. Push the lever away from you into position
@ . The message
ACC: standby appears.
.. To resume cruise control, press the brake
pedal and pull the lever toward you into po­
sition @.
_& WARNING
It is dangerous to activate cruise contro l
and resume the stored speed when the
current road, traffic or weather conditions
do not permit th is . This could result in a
crash .
Setting the distance
Appl ies to vehicles: with Audi adaptive cruise co ntrol
Fig. 78 Opera tin g lev er: Se tting the d ista nce
-
.. Tap the switch to display the current set dis ­
tance
¢ fig . 78.
.. To increase or reduce the distance in incre­
ments, tap the switch again to the right or
left . The distance between the two vehicles
will change in the instrument cluster d is ­
play .
Audi adaptive cruise control 87
When approaching an object detected ahead,
the adaptive cruise control system brakes to
match that object's speed and then regulates
to the stored distance . If the object detected
ahead accelerates, adaptive cru ise control w ill
also accelerate up to the stored speed .
The hig her the speed, the greater the distance
in meters ¢
A. The Distance 3 setting is rec­
ommended. That is equal to the general rec­
ommendation of "half the speed shown on
the speedometer ".
The distances provided are example values. Depending on the driving situation, the cur­
rent speed and the way the object detected
ahead is driving, the actual distance may be
more o r less than these target distances .
o:;:::::,_o:;:::::, ___ Distance 1: This setting corre-
sponds to a d istance of 2 feet/ 28 meters
when traveling at 62 mph (100 km/h), or a
time distance of 1 second .
o:;:::::, __ o:;:::::, __ Distance 2: This setting corre­
sponds to a d istance of 118 feet/ 36 meters
when traveling at 62 mph (100 km/h), or a
time distance of 1.3 seconds.
o:;:::::, ___ o:;:::::,_ Distance 3: This setting corre-
sponds to a d istance of 164 feet/ 50 meters
when traveling at 62 mph (100 km/h), or a
time distance of 1.8 seconds.
o:;:::::, ____ o:;:::::, Distance 4: This setting corre-
sponds to a d istance of 219 feet/ 67 meters
when traveling at 62 mph (100 km/h), or a
time distance of 2 .4 seconds.
_& WARNING
Following other vehicles too closely in­
cre ases the risk of collisions and serious
personal injury.
- When setting the distance, you as the
driver are responsible for adhering to any
applicable local regulations .
(D Tips
Distance 3
is set automatically each time
you switch the ignition on.
It you would
like to have th is distance as a basic setting, .,..

90 Audi pre sense
Audi pre sense
Introduction
Applies to vehicles: with Audi pre sense basic or Audi pre
sense front
Within the limits of the system, pre sense ba­
sic and pre sense front can initiate steps to
protect vehicle occupants in certain danger ­
ous situations.
Critical driving situations can be recognized by
the pre sense front via a network of different
vehicle systems and can take steps to prepare
the vehicle occupants for a potential collision.
The pre sense front works with a radar sensor
and a video camera*.
It also functions within
the limits of the system when adaptive cruise
control* is switched
off.
General information
General information
App lies to vehicles: with Audi pre sense front or Audi
adaptive cruise control
A WARNING
Also follow the general information found
on
~ page 82, General information.
Audi pre sense basic
Descript ion
Applies to vehicles: with Audi pre sense basic
The function of the pre sense basic is activat­
ed at a speed of 10 mph (30 km/h) or higher.
The following functions can be triggered un­
der certain conditions within the limits of the
system:
- Tensioning of the safety belts (for example,
during heavy braking) : The front safety belts
have reversible belt pretensioners. If a colli­
sion does not occur, the safety belts loosen
slightly and are ready to trigger again .
- Closing the windows and the sunroof* (for
example, when over- or understeering): The
windows and the sunroof" close until there is only a small gap open. Audi drive select:
The deployment time is
adapted in dynamic mode.
A WARNING
-The pre sense basic cannot overcome natu- ral physical laws.
It is a system designed to
assist and it cannot prevent a collision. Do not let the increased safety provided
tempt you into taking risks. This could in­
crease your risk of a collision.
- The system can deploy incorrectly due to system-specific limits .
(D Tips
-Certain pre sense basic functions switch
off when ESC is switched off (sport
mode) or when driving in reverse .
- The pre sense basic functions may not be
available if there is a malfunction in the
ESC system or the airbag control mod­
ule .
- Note that with pre sense basic, the rever­
sible safety belt pretensioner on the
front passenger's side deactivates when
the front passenger's a irbag is deactivat­
ed.
Audi pre sense front
Description
Applies to vehicles: with Audi pre sense front or Audi
adapt ive cru ise control
Pre sense front informs you if the distance to
the vehicle ahead falls below the safe distance
for an extended period of time. It can warn of a possible collision and initiate braking ma­
neuvers, within the limits of the system .
When detected in time, the system can assess
dangerous situations where an object ahead
brakes suddenly or if your own vehicle is trav­
eling at a high speed and approaching an ob ­
ject that is moving more slow ly . If detection is
not possible, then pre sense front does not re ­
act.

Warnings
Applies to vehicles: with Audi pre sense fro nt or Audi
adaptive cruise control
Fig . 80 Instrument cluster: approach warning
The system recognizes various dangerous sit­
uations:
- Vehicles with adaptive cruise control: The
distance warning occurs if you drive too
closely to the object ahead for a long period
of time.
If the object ahead brakes strongly,
you would not be able to avoid a collision.
The ind icator light . indicates this.
- The
approach warning occurs when an ob­
ject ahead is traveling more slowly or brakes
strongly. When this warning occurs, it may only be possible to avoid a collision by
swerving or braking strongly. The message
Audi pre sense. Distance c::> fig . 80 and a
warning tone will warn you about the dan­ ger. For vehicles with adaptive cruise con­
trol, the. indicator light also turns on.
If you do not react enough or not at all to a
dangerous s ituation that was detected by the
system, pre sense front provides assistance by
applying the brakes .
- If a collision is imminent, the system will
first provide an
acute warning by braking
sharply. You will also be made aware of the
danger by the instrument cluster display
c::> fig. 80. For vehicles with adaptive cruise
control, the. indicator light also turns on .
-If you do not react to the acute warning, pre
sense front can brake with increasing force
within the limits of the system
l)_ This re­
duces the vehicle speed in the event of a col-
l l This is not available in some countries .
Audi pre sense 91
lision. The message Audi pre sense -Input
also appears.
- At low driving speeds, pre sense front can
begin complete deceleration shortly before
a collision
l) .
-If pre sense front determines that you are
not braking strongly enough when a colli­
sion is imminent, it can increase the braking
force.
A WARNING
--- Pre sense front cannot overcome natural
physical laws.
It is a system designed to
assist and it cannot prevent a collision .
The driver must always intervene. The driver is always responsible for braking
at the correct t ime. Do not let the in­
creased safety provided tempt you into
taking risks. This could increase your risk
of a collision.
- The system can deploy incorrectly due to
system-specific limits .
- Please note that the sensor does not al­
ways detect all objects . This increases
the risk of a collision.
- Pre sense front does not react to people
or animals or objects that are crossing
the vehicle's path or are difficult to de­
tect
c::> page 82, General Information.
- Reflective objects such as guard rails or
the entrance to a tunnel, heavy rain and
ice can affect the function of the radar
sensor and the system's ability to detect
a collision risk .
- Lack of attention can cause collisions,
other accidents and serious personal in­
juries. The pre sense front is an assist
system and cannot prevent a collis ion by
itself. The driver must always intervene.
The driver is always responsib le for brak­
ing at the correct time.
- Always pay close attention to traffic,
even when the pre sense front is switch-
ed on. Be ready to intervene and be ready .,_

92 Audi pre sense
to take complete control whenever nec­essary. Always keep the safe and legal
distance between your vehicle and
vehicles up ahead .
- Pre sense front works within limits and
will not respond outside the system lim­
its, for example when approaching a
stopped vehicle or stationary obstacle
(end of a traffic jam or vehicle that has
broken down in traffic).
- Always remember that the radar sensor
for the pre sense front works only within
defined detection and range limits that
may prevent the proper detection of oth­
er vehicles.
- The radar sensor's function and range
can be reduced by rain, snow and heavy
spray. Moving vehicles up ahead may not
be promptly detected or may not be de­
tected at all.
- Reflective surfaces including crash barri­
ers or tunnel entrances may impair the
function of the radar sensor.
(]) Note
The sensor can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. The pre sense front sensor can
be damaged by this. Have your authorized
Audi dealer or qualified repair facility
check their function.
@ Tips
- You can cancel the braking with increas­ ing force that is initiated by the system
by braking yourself, by accelerating no­
ticeably or by swerving.
- Driver messages about pre sense
¢page 92.
- Keep in mind that pre sense can brake
unexpectedly. Always secure any cargo or
objects that you are transporting to re­
duce the risk of damage or injury.
- Certain pre sense front functions switch off when ESC is switched off (sport
mode) or when driving in reverse. -
The pre sense front functions are not
available if there is a malfunction in the
adaptive cruise control* system
¢page
88 or ¢page 92.
- Keep in mind that pre sense front can
brake unexpectedly. Always secure any
cargo or objects that you are transport­
ing to reduce the risk of damage or in­
jury .
Settings in the Infotainment system
Applies to vehicles: wit h Audi pre sense front or A udi
adap tive c ru ise contro l
.,. Select in the MMI: I MENU I button> Systems
control button or Car systems > Driver as­
sistance
> Audi pre sense.
Switching the system on and off
Audi pre sense (System): If the system is
switched off, it switches on again automati­
cally once the ignition is switched on again.
System -Switch Audi pre sense on-off. With
this, you can switch the prewarning and the
braking intervention from Audi pre sense on
or off .
Prewarning -The distance and approach
warnings can be switched
on/off.
(D Tips
- If you restrict or switch off the ESC, the
pre sense also switches itself
off
¢ page 187.
-Switch the pre sense off when you a re
loading the vehicle onto a vehicle carrier,
train, ship or other type of transporta­
tion. This can prevent undesired warn­
ings from the pre sense system.
Driver messages
Applies to vehicles: wit h Audi pre sense o r A udi ada ptive
cruise co ntrol
Audi pre sense currently unavailable. No sen­
sor vision
This message appears if the sensor view is ob­
structed, for example by leaves, snow, heavy .,.

94 Audi acti ve lan e assi st
Audi active lane assist
Lane assist
Description
App lies to vehicles: with Audi active lane assist
Active lane ass ist detects lane marker lines
within the limits of the system using a camera
in the windshield . If you are approaching a de­
tected lane marker line and it appears likely
that you wi ll leave the lane, the system will
warn you with corrective steering. You can
ove rride this steering at any time . If you pass
over a line, the steering wheel will vibrate lightly. In order for this warning vibration to
occur, it must first be switched on in the MMI.
Active lane ass ist is operable when the lane
marker line is detected on at least one side of
the vehicle .
The system will not warn you before cross ing
a lane marker Line if you have activated the
turn signal. In t his case, it assumes that you
a re changing lanes intent ionally.
The system is designed for driv ing on express ­
ways and h ighways and therefore only acti­
vates at speeds above app roximately 40 mp h
(65 km/h).
A WARNING
- The sys tem w arns the d river that the ve­
hicle is leaving the lane us ing corrective
steering . The driver is always responsible
for keeping the vehicle within the lane .
- The system can help you keep the vehicle
in the lane, but it does not drive by itself.
Always keep your hands on the steering
wheel.
- Co rrective stee ring may not occur in cer­
tain situations, such as d uring heavy
braking.
- There may be cases where the camera
does not recognize all lane marker lines.
Corrective steering can only take p lace
on the side of the veh icle where lane
marke r lines a re detected .
l) Thi s func tion is not available in a ll co untries.
- Other road structures or objects cou ld
possibly be identified un intent ionally as
lane marker lines. As a result, correct ive
steer ing may be unexpected or may not
occ ur.
- The camera view can be restricted, for
examp le by vehicles driving ahead or by
ra in, snow , heavy spray light shining into
the camera or by dirt on the window . T his
can result in act ive lane assist not detect­
ing the lane marke r lines or detec ting
them incorrect ly .
- I n certain sit uat ions where visibili ty is
low, the vehicle may swi tch from "early"
to "late" corrective steering
l).
-Unde r ce rtain condi tions such as ruts in
the road, an incl ined roadway or c ross­
winds, the corrective steering alone may not be enough to keep the vehicle in the
middle of the lane.
- For safety reasons, active lane assist
must not be used when the re a re poor
road and/or weather conditions such as
slippery roads, fog, grave l, heavy rain,
snow and the potential for hydroplaning .
Using act ive lane assist under these con­
d itions may increase the risk of a c rash .

96 Audi active lane assist
@ So lid lines: act ive la ne assist is sw itch-
ed on and ready to provide wa rn in gs on
t he s ide th at is indica ted.
@ B linking lines ( left or right): active lane
assist is warning you by a vibration in
t he stee ring wheel that yo u are l eaving
t h e l ane.
® Unfilled line(s): active lane assist is
switched on but is not rea dy to prov ide
warnings.
N o lines: t he active lane assist is
switched
off .
Multicolored display
Refe r to¢ fig. 8 4
@ Solid white lines : active la ne assist is
switched on and ready to provide warn-
ings on the side that is ind icated.
@ Red lin es (left or r igh t): ac tive lane as-
sis t is warning you by a vibration in t he
steering whee l th at you a re leav ing the
lane.
® Gray unfilled lines: active lane ass ist is
s witched on but is not ready to prov ide
w ar nings.
N o lines: the active lane assist is
switched
off.
Messages in the instrument cluster
display
I f the active lane ass ist has a mal func tion, the
B indicato r light in the inst rumen t cluste r
di spl ay t urn s
off and one of the followi ng
me ssages appe ars:
Audi active lane assist: currently not avai la ­
ble. No camera view
This message appears if the camera is unable
to detect the li nes . This co uld happe n if:
- The came ra field of view ¢
page 95, fig. 82
is dirty o r covered i n ice. Clean the area on
t h e windshie ld.
l ) Thi s function is not available in all cou ntr ies.
- The camera field o f view is fo gged ove r. Wa it
until the fog has cleared before switching
the act ive lane assist on agai n.
- The system has bee n una ble to detect t he
lanes for an exten ded period of t ime due to
road conditions. Switch the active lane as­
sist bac k on when the lines are more v is ible.
Audi active lane assist: currently unavailable
T he re is a te mporary a ct ive lane assis t mal­
f unc tion. Try swi tching the active lane assi st
o n again later .
Audi active lane assist: system fault!
Drive to an authorized A udi dealer or qualified
repair fac ility immediately to have the mal­
funct ion corrected.
B Audi active lane assist: Please continue
steering vehicle!
T his messa ge ap pears if yo u are not stee ring
by yoursel f. If th is is t he case, act ive lane as ­
s ist does not switch
off, but it is "not ready" to
provide a warning. The system can help you
kee p the vehicle in the lane. However, yo u are
r esponsible for dr iv ing the vehicle and must
stee r it yourse lf .
Adjusting the steering time and
vibration warning
App lies to veh icles: w ith Audi ac tive la ne ass ist
You can adju st individual active lane assis t
se ttings in the MMI.
"' Select: !ME NUI button> Systems cont ro l
but to n or
Car sy stem s > Driver assistance >
Audi active lane assist .
Steering timel)
Early :
in this setting, the correct ive steering
happens con tinuously to he lp keep the vehicle
i n t he c ent er of t he lane.
Late : in this setting, the system provides cor ­
rect ive steer ing just befo re a vehicle whee l
touches a detected lane marke r line . ..,.

Vibration warning
You can switch the additional v ibrating wa rn­
ing in the steering wheel on or off .
&_ WARNING ,~
With the vibration warning switched off,
no v isible warning will appear in the in­
strument cluster display when cross ing a
lane marker.
(D Tips
Market-specific: Your settings are auto­
matically stored and assigned to the re­
mote control key being used.
Audi active lane assist 97
•

98 Audi side assist
Audi side assist
Side assist
Description
App lies to vehicles: with Audi side assist
Fig . 85 Se nsor detect ion ra nge
Fig. 86 Display o n the exte rior mirror
Side assist helps you monitor your blind spot
and traffic behind your vehicle. Within the
limits of the system, it warns you about
vehicles that are coming closer or that are
traveling with your within sensor range@
c:> fig. 85: if a lane change is classified as criti­
cal, the display@in the exterior mirror
c:> fig. 86 turns on.
The display in the left exterior mirror provides
assistance when mak ing a lane change to the
left, while the display in the right exterior mir­
ror provides assistance when making a lane
change to the right.
Information stage
As long as you do not activate the turn signal,
side assist
informs you about vehicles that are
detected and class ified as critical. The display
in the mirror turns on, but is dim. The
display remains dim in the information
stage so that your view toward the front is not
disturbed .
Warning stage
If you activate the turn signal, side assist
warns you about vehicles that are detected
and class ified as critical. The display in the re­
spective mirror blinks brightly. If this hap­
pens, check traffic by glancing in the rearview
mirror and over your shoulder
c:> .&. in General
information on page 99.
(D Tips
- You can adjust the brightness on of the
display on the rearview mirror
c:>page 100.

General information
Applies to vehicles: with Audi side assist
®
®
©
Fig . 87 Driving situations
I AUDI
Fi g. 88 Rear of the vehicle: sensor posit ions
Side assist functions at speeds above approx i­
mately 19 mph (30 km/h).
@ Vehicl es th at ar e approaching
In certain cases, a vehicle will be classified as
cr itical for a lane change even if it is still
somewhat far away. The fas ter a vehicle ap­
p roaches, t he sooner the display in the exteri­
or m irror will t urn on.
@ V ehicles traveling with you
Vehicles traveling w ith you are indicated in the
exterior m irror if they are classified as cr itical
for a lane change. All vehicles detec ted by
side assist are indicated by the time they en­
t er your "blind spot", at the latest.
Audi side assist 99
© Veh icles left behind
If you s low ly pass a vehi cle that s ide assist has
detected (the difference in speed between the
vehicle and you r vehicle is less than 9 mph or
15 km/h), the display in the exterio r mir ro r
turns on as soon as the vehicle enters your blind spot.
T he disp lay will not t urn on if you quickly pass
a vehicle that side assist has detected (the dif­
ference in speed between the veh icle and your
vehicle is greater than 9 mph or 15 km/h).
Functional limitations
The radar sensors are designed to detect the
left and right adjacent lanes when the road
lanes are the normal width. In some sit ua­
tions, the d isp lay in the exterior mirror may
turn on even though there is no ve hicle locat­
ed in the area that is cr itical for a lane cha nge.
For example:
- If the lanes are narrow or if your are driving
on the edge of your lane.
If this is the case,
the system may have detected the vehicle in
another lane that is
not adjacent to you r
current lane .
-If you are dr iving through a curve . S ide as­
sis t may react to a vehicle that is one lane
over from the adjacent lane.
- If side assist reacts to other objects (such as
high or d isp laced guard rails) .
- In poor weather conditions. The side assist
functions are limited .
Do not cover the radar sensors
c> fig. 88 with
stickers, depos its, bicycle wheels or other ob­
jects, because this will affect the funct ion. For
information on cleaning, see
c> page 201 .
A WARNING
-Always pay attention to traffic and to the
a rea a round your ve hicl e. Side assi st can­
not repla ce a d river's attention. The driv ­
er a lone is always responsible for la ne
cha nges and s imilar dr iv ing ma ne uvers.
- In some si tua tions, the system may not
function or its function may be limited.
F or examp le: